Thanks but that doesn't work. At the end, each segment must be grouped to make a wheel, and thus I run into the same problem with convex mesh, the wheel looses all physics.

So i got done with part of my creation, the wheel. The wheel has an inside cutout (pushout) that i wanted as a physical surface, and the wheel needs to move, but i noticed that convex hull doesn't work with wheels with inside cutouts and static mesh doesn't move. I read that static mesh doesn't move because it requires too much processing. What I'm trying to make is a physics simulation and i don't care if I only get 1 frame a second. If not possible, is it because of NGD or SP? Also if not possible could you please refer me to another application? But not WM2D, it's flawed. I must make a working simulation! Please HALP!